Africa's biggest oil refinery has been opened in Nigeria, where it is hoped it will alleviate chronic fuel shortages.
Nigeria is a major oil producer but most of this is sent abroad while it has to import the refined fuel used in vehicles and elsewhere.
As a result the country often faces chronic fuel shortages.
This is the problem that the $19bn (£15.2bn) refinery, owned by Africa's richest man, Aliko Dangote, is intended to tackle.
"This is a game-changer for the Nigerian people," said President Muhammadu Buhari.
The plant, which is not yet operational, has the capacity to produce about 650,000 barrels of petroleum products a day – more than enough to supply the country's needs. It also includes a power station, deep seaport and fertiliser plant.
Nigeria's existing refineries have been completely shut down for over three years owing to oil theft, pipeline vandalism and structural neglect.
If it works as planned, the plant could make a real change to the lives of Nigerians: "Every time there is fuel scarcity, I don't open my shop because there's no light [electricity] to work and I can't buy fuel for my generator," a young hairdresser from Lagos told the BBC.
At Monday's launch, Mr Dangote outlined his hopes for the refinery: "Our first goal is to ramp up production of the various products to ensure that within this year, we are able to fully satisfy the nation's demand for quality products."
However, it is not clear what impact the plant will have on the price of fuel in a country where retail prices are subsidised. The government says these subsidies will soon be removed – last year they took up at least a quarter of the national budget.
Mr Dangote's plant in Lagos, which took nearly seven years to build, is said to be the world's largest single-train refinery, meaning the plant has one integrated distillery system which can produce a variety of products and petrochemicals, instead of having different units for each type of product.
It is one of the last major projects to be inaugurated by President Buhari, who steps down next week after serving two terms in office.
President Buhari will hand power to Bola Tinubu, who won disputed presidential elections in February.
Oil and gas expert Henry Adigun told the BBC that Monday's launch was "more political than technical".
Is the climate agreement enough to keep global temperatures in check?
Will the transition to a new clean energy system happen quickly, or will we fry the planet first?
A refinery that could make Nigeria self-sufficient in fuel receives its first delivery of crude oil.
Soldiers are deploying, days after Venezuela announces plans to take over part of Guyana.
COP28 host country the United Arab Emirates is "cautiously optimistic" on a deal to at least reduce them.
Copyright 2023 BBC. All rights reserved. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
Beta Terms By using the Beta Site, you agree that such use is at your own risk and you know that the Beta Site may include known or unknown bugs or errors, that we have no obligation to make this Beta Site available with or without charge for any period of time, nor to make it available at all, and that nothing in these Beta Terms or your use of the Beta Site creates any employment relationship between you and us. The Beta Site is provided on an “as is” and “as available” basis and we make no warranty to you of any kind, express or implied.
In case of conflict between these Beta Terms and the BBC Terms of Use these Beta Terms shall prevail.
